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Mount St Helens
On May 18, 1980, after a long period of rest, this quiet
mountain in Washington provided detailed
observations on the mechanics of highly explosive eruptions.
Long Valley
This field seismometer measures earthquakes associated
with subsurface volcanic forces and may help to predict
future events. It sits on a plateau known as the "Volcanic
Tableland" formed by a major eruption 600,000 years ago.
created by Rich Castellano,
[email protected]
Volcanic Studies,
Big University
last modified: April 1, 1995
